docs: def _get_visualization_classes():
      """Import visualizations classes dynamically
      """
      visualization_attr = vars(import_module('picasso.visualizations'))
      visualization_submodules = [
          visualization_attr[x]
          for x in visualization_attr
          if isinstance(visualization_attr[x], ModuleType)]
      visualization_classes = []
      for submodule in visualization_submodules:
          attrs = vars(submodule)
          for attr_name in attrs:
              attr = attrs[attr_name]
              if (inspect.isclass(attr)
                  and issubclass(attr, BaseVisualization)
                      and attr is not BaseVisualization):
                  visualization_classes.append(attr)
      return visualization_classes